Best Trailer Light Control Modules for Reliable Towing
Choosing a trailer light control module helps ensure your vehicle and trailer stay in sync on the road. This guide highlights five reliable options, covering splice-in converters and powered modules that handle turn, brake, and tail lights across different vehicle setups. Each entry includes practical installation notes, compatibility considerations, and what to expect in daily use.
| Product | Brand | Key Feature |
|---|---|---|
| GM Genuine Parts 85073615 Trailer Brake Control Module | GM GENUINE PARTS | |
| CURT 56130 Non-Powered 3-to-2-Wire Splice-in Trailer Tail Light Converter | CURT | |
| Hopkins 48925 Tail Light Converter with 4 Wire Flat Extension | Hopkins Manufacturing | |
| CURT 56196 2-to-3-Wire Splice-in Trailer Tail Light Converter | CURT | |
| Tekonsha 119190 ModuLite HD Plus Protector | Tekonsha |
The products below are organized to help readers compare installation needs, electrical demand, and compatibility with common towing setups—from simple taillight conversion to more robust, vehicle-electrical-system protection.
GM Genuine Parts 85073615 Trailer Brake Control Module
The GM Genuine Parts 85073615 Trailer Brake Control Module is designed, engineered, and tested to rigorous GM specifications. This part aligns with Chevrolet, Buick, GMC, and Cadillac vehicles, delivering OE-grade performance and reliability. It may reflect prior ACDelco branding in some contexts but remains backed by General Motors engineering validation for proper integration with GM electronic brake systems.
CURT 56130 Non-Powered 3-to-2-Wire Splice-in Trailer Tail Light Converter
This non-powered tail light converter is a dependable splice-in option when a CURT custom harness isn’t available. It converts a 3-wire vehicle electrical system to a standard 2-wire trailer system and provides a standard 4-way flat socket for taillights, brakes, and turn signals. Wires are color-coded to help installers match circuits quickly, with circuit ratings of 3.0 amps (signal) and 5.0 amps (taillight) for straightforward integration.
Hopkins 48925 Tail Light Converter with 4 Wire Flat Extension
The Hopkins 48925 converter focuses on seamless vehicle-to-trailer compatibility. It converts separate brake and turn signals from modern vehicles to a single taillight system used by most trailers. It includes a built-in 4-flat connector for immediate trailer hookup and a long 72-inch harness to accommodate various vehicle layouts, simplifying flexible installations.
CURT 56196 2-to-3-Wire Splice-in Trailer Tail Light Converter
This CURT converter is designed for dinghy towing behind RVs or larger vehicles, converting a 2-wire system to a 3-wire trailer setup. It offers a dependable splice-in option and can be connected to a 4-way flat socket for convenient use. Color-coded wires help streamline installation, with 2.1 amps for signal circuits and 5.0 amps for taillights to support common trailer lighting demands.
NEW SUN 3-Way to 2-Way Trailer Tail Light Converter
This converter converts a 3-wire front lighting system to a standard 2-wire trailer taillight setup. It handles a range of trailer lighting configurations and eliminates the need for additional heavy-duty flashers or direct battery connections. It supports up to 2.1 amps for turns/stops and 7.5 amps for taillights, with universal compatibility for many towing scenarios.
Tekonsha 119190 ModuLite HD Plus Protector
The ModuLite HD Plus offers universal applicability for most vehicles, including those with multiplexed (PWM) signals. It draws power directly from the vehicle battery and uses minimal sensing current, enabling compatibility with both LED and incandescent trailer lights. It provides protective features and is designed for higher-current demands on turns, stops, and taillights, supporting a robust towing setup.
Tekonsha 119147 ModuLite HD Protector
This Tekonsha ModuLite HD Protector focuses on powering trailer lights directly from the tow vehicle’s battery while protecting the vehicle’s electrical system from overloads. Ideal for trailers with multiple lights or complex lighting configurations, it ensures consistent brightness and reliable operation across different lighting loads, including LEDs and incandescents.
Buying Guide
Key purchase considerations help buyers match a trailer light control module to their needs. Consider the following perspectives:
- Vehicle compatibility: Some modules support multiplexed or PWM systems, while others are standard 12V converters. Check your vehicle’s electrical architecture and the trailer’s wiring.
- Wiring configuration: Splice-in converters require precise color-code matching. Non-powered converters need a compatible ground path and a stable chassis ground.
- Power source: Powered modules draw from the vehicle battery and can handle higher current loads, which is important for trailers with multiple lights or LED configurations.
- Protection features: Look for overload protection, short-circuit safeguards, and thermal considerations to prevent electrical faults.
- Ease of installation: Consider harness length, included connectors, and whether you’ll need to add a separate flasher or relay in your setup.
- Durability and environment: Waterproof or weather-rated enclosures benefit trailers exposed to the elements or off-road use.
- Future-proofing: If you plan to upgrade lights (e.g., LEDs) or switch to different trailer configurations, choose a module with broad compatibility and higher current ratings.
In summary, the selected modules offer a range of installation styles—from simple splice-in solutions to powered, protected modules designed for demanding towing setups. Evaluate your vehicle’s electrical system, trailer type, and preferred installation complexity to determine the best match for reliable trailer lighting.